don't cut defense by $1 trillion. that's what we're talking about. >> what national security issue -- >> who's cutting it by $1 trillion? >> ryan simply can't explain his 20% tax cut. bottom -- >> you have refused, and, again, to offer specifics on how you pay for that 20% across the board tax cut. do you actually have the specifics or are you still working on it and that's why you won't tell voters? >> different than this administration, we actually want to have big bipartisan agreements. you see, i understand -- >> do you have the specifics? do you have the -- do you know exactly what you're doing? >> look at what ronald reagan and tip o'neill did. >> no specifics? >> what we're saying is lower tax rates 20%. start with the wealthy, work with congress to do it. >> you guarantee this math will add up? >> absolutely. six studies have guaranteed, six studies verified this math adds up. >> ryan promises the numbers, they'll add up. someday. my math teacher would not have accepted that answer and i don't think yours woul